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A second package called the VirtualBox Open Source Edition (OSE) was released under GPLv2. This removed the same proprietary components not available under GPLv2. [30] [27] Since version 4.2 [citation needed], building the BIOS for VirtualBox requires the Open Watcom compiler, [31] which is released under the Sybase Open Watcom Public License.
Open Virtualization Format (OVA) - As of v14.0 was the default VM format. It supports VirtualBox and most VMware products (e.g. Workstation, Player, Fusion and vSphere/ESX). Also includes open-vmtools (for VMware).
VMDK (short for Virtual Machine Disk) is a file format that describes containers for virtual hard disk drives to be used in virtual machines like VMware Workstation or VirtualBox. Initially developed by VMware for its proprietary [1] virtual appliance products, VMDK became an open format [2] [dead link ] with revision 5.0 in 2011, and is one ...
Open Virtualization Format (OVF) is an open standard for packaging and distributing virtual appliances or, more generally, software to be run in virtual machines. The standard describes an "open, secure, portable, efficient and extensible format for the packaging and distribution of software to be run in virtual machines ".
VMware ESX Server 3.0 Yes, add-on, up to 4 way Yes Yes Virtualization: Server consolidation, service continuity, dev/test Up to near native [citation needed] Yes VMware ESX Server 2.5.3 Yes, add-on, 2 way Yes Yes Virtualization: Server consolidation, service continuity, dev/test Up to near native [citation needed] Yes VMware Fusion: Yes Yes Yes
Virtual appliances are provided to the user or customer as files, via either electronic downloads or physical distribution. The file format most commonly used is the Open Virtualization Format (OVF). It may also be distributed as Open Virtual Appliance (OVA), the .ova file format is interchangeable with .ovf.
Examples outside the mainframe field include Parallels Workstation, Parallels Desktop for Mac, VirtualBox, Virtual Iron, Oracle VM, Virtual PC, Virtual Server, Hyper-V, VMware Fusion, VMware Workstation, VMware Server (discontinued, formerly called GSX Server), VMware ESXi, QEMU, Adeos, Mac-on-Linux, Win4BSD, Win4Lin Pro, and Egenera vBlade ...
As with KQEMU, VirtualBox runs nearly all guest code natively on the host via the VMM (Virtual Machine Manager) and uses the re-compiler only as a fallback mechanism – for example, when guest code executes in real mode. [21] In addition, VirtualBox did a lot of code analysis and patching using a built-in disassembler to minimize recompilation.